/Engine/Plugins/VirtualProduction/DMX/DMXEngine/Source/DMXRuntime/Public/Library/DMXEntityFixturePatch.h
Returns the number of channels this Patch occupies with the Fixture functions from its Active Mode or 0 if the patch has no valid Active Mode
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintPure, Category="DMX|Fixture Patch") int32 GetChannelSpan() const